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#1 2012-04-01 11:10:33

penguin
Member
From: Gotham City
Registered: 2010-12-31
Posts: 168

[SOLVED] cpufreq only works sometimes?

Just installed Arch on a new laptop, that already ran Debian Linux, where cpufreq worked. However in Arch it is stuck on the lowest frequency (1.2 GHz), and cant scale up. This is the case most of the time when I boot the computer, but I do know that a few times it has worked, without me doing anything in particular.

My rc.conf:

MODULES=(acpi-cpufreq cpufreq_ondemand)
USEDMRAID="no"
USEBTRFS="no"
USELVM="no"
DAEMONS=(syslog-ng !netfs !network @crond dbus @wicd !avahi-daemon @alsa @sshd @acpid @cpufreq)

And the output of cpufreq-info (note that "current policy" is stuck between 1.2 and 1.2 GHz)

cpufreq-info                                                                   0
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 0 1 2 3
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 10.0 us.
  hardware limits: 1.20 GHz - 2.53 GHz
  available frequency steps: 2.53 GHz, 2.53 GHz, 2.40 GHz, 2.27 GHz, 2.13 GHz, 2.00 GHz, 1.87 GHz, 1.73 GHz, 1.60 GHz, 1.47 GHz, 1.33 GHz, 1.20 GHz
  available cpufreq governors: ondemand, performance
  current policy: frequency should be within 1.20 GHz and 1.20 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 1.20 GHz.
analyzing CPU 1:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 0 1 2 3
  CPUs which need to have their frequency coordinated by software: 1
  maximum transition latency: 10.0 us.
  hardware limits: 1.20 GHz - 2.53 GHz
  available frequency steps: 2.53 GHz, 2.53 GHz, 2.40 GHz, 2.27 GHz, 2.13 GHz, 2.00 GHz, 1.87 GHz, 1.73 GHz, 1.60 GHz, 1.47 GHz, 1.33 GHz, 1.20 GHz
  available cpufreq governors: ondemand, performance
  current policy: frequency should be within 1.20 GHz and 1.20 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 1.20 GHz.
analyzing CPU 2:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 0 1 2 3
  CPUs which need to have their frequency coordinated by software: 2
  maximum transition latency: 10.0 us.
  hardware limits: 1.20 GHz - 2.53 GHz
  available frequency steps: 2.53 GHz, 2.53 GHz, 2.40 GHz, 2.27 GHz, 2.13 GHz, 2.00 GHz, 1.87 GHz, 1.73 GHz, 1.60 GHz, 1.47 GHz, 1.33 GHz, 1.20 GHz
  available cpufreq governors: ondemand, performance
  current policy: frequency should be within 1.20 GHz and 1.20 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 1.20 GHz.
analyzing CPU 3:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 0 1 2 3
  CPUs which need to have their frequency coordinated by software: 3
  maximum transition latency: 10.0 us.
  hardware limits: 1.20 GHz - 2.53 GHz
  available frequency steps: 2.53 GHz, 2.53 GHz, 2.40 GHz, 2.27 GHz, 2.13 GHz, 2.00 GHz, 1.87 GHz, 1.73 GHz, 1.60 GHz, 1.47 GHz, 1.33 GHz, 1.20 GHz
  available cpufreq governors: ondemand, performance
  current policy: frequency should be within 1.20 GHz and 1.20 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 1.20 GHz.

Any suggestions would be much appreciated.

EDIT (solved!): Problem was the power supply unit (65W) to my Lenovo laptop wasn't giving the juice I needed. Cpufreq works with 90 W PSU.

EDIT (old): As I note below, this problem is also happening in Debian. I guess it was just a fluke that it was working right when I checked in Debian 6.0. So this is not an Arch specific thing, I guess.

Last edited by penguin (2012-04-18 17:47:52)

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#2 2012-04-01 11:43:00

yasar11732
Member
Registered: 2010-11-29
Posts: 127

Re: [SOLVED] cpufreq only works sometimes?

I am experiencing the same problem.

Yo Dawg, I heard you likes patches, so I have created a patch for your patch, so you can patch your patches before you patch.

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#3 2012-04-01 12:42:48

penguin
Member
From: Gotham City
Registered: 2010-12-31
Posts: 168

Re: [SOLVED] cpufreq only works sometimes?

I wonder if this has something to do with the fact that acpid and cpufreq might start in different order, since I'm starting them in the background in the DAEMON array. I've removed the "@" for these two, and will check next reboot if the situation is the same.

(my cpufreq driver is the acpi one).

@yasar11732 how do you start the cpufreq daemon? Could you post the relavent part of your rc.conf

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#4 2012-04-01 14:46:32

yasar11732
Member
Registered: 2010-11-29
Posts: 127

Re: [SOLVED] cpufreq only works sometimes?

Here it is:

MODULES=(ipw2200 acpi-cpufreq cpufreq_ondemand cpufreq_powersave cpufreq_userspace)
DAEMONS=(syslog-ng @crond dbus hal networkmanager slim)

I didn't know I was supposed to run them as daemons too, I only loaded required modules, sometimes it works fine, sometimes it doesn't.

Edit: I am using trayfreq to control frequencies.

Last edited by yasar11732 (2012-04-01 14:50:49)

Yo Dawg, I heard you likes patches, so I have created a patch for your patch, so you can patch your patches before you patch.

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#5 2012-04-02 05:04:00

penguin
Member
From: Gotham City
Registered: 2010-12-31
Posts: 168

Re: [SOLVED] cpufreq only works sometimes?

OK, problem still persists, even when I have:

MODULES=(acpi-cpufreq cpufreq_ondemand)
DAEMONS=(syslog-ng !netfs !network @crond dbus @wicd !avahi-daemon @alsa @sshd acpid cpufreq)

Right now I'm using my laptop without any battery. I wonder if that might be the reason?

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#6 2012-04-02 05:36:53

KingX
Member
From: CA
Registered: 2010-03-24
Posts: 324

Re: [SOLVED] cpufreq only works sometimes?

MODULES=(acpi-cpufreq cpufreq_conservative coretemp it87)

This is how my modules array looks like, seems like you are not loading the module for your cpu. What cpu do you have? Did you follow the wiki

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#7 2012-04-02 13:32:25

yasar11732
Member
Registered: 2010-11-29
Posts: 127

Re: [SOLVED] cpufreq only works sometimes?

penguin wrote:

Right now I'm using my laptop without any battery. I wonder if that might be the reason?

I don't think so, I am using mine with a battery, but still experience the problem.

Yo Dawg, I heard you likes patches, so I have created a patch for your patch, so you can patch your patches before you patch.

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#8 2012-04-03 07:52:55

penguin
Member
From: Gotham City
Registered: 2010-12-31
Posts: 168

Re: [SOLVED] cpufreq only works sometimes?

@KingX
I have an Intel i540 CPU (thinkpad X201), and I think I'm doing all the right things. I booted into Debian to see which module/driver was loaded there (also using acpi-cpufreq), but noticed that it's behaving the exact same way as in Arch (i.e. I was wrong in my first post about not having this problem when booting into Debian).

So it obviously can see all the available frequencies:

 available frequency steps: 2.53 GHz, 2.53 GHz, 2.40 GHz, 2.27 GHz, 2.13 GHz, 2.00 GHz, 1.87 GHz, 1.73 GHz, 1.60 GHz, 1.47 GHz, 1.33 GHz, 1.20 GHz

But yet it keeps on telling me that:

  current policy: frequency should be within 1.20 GHz and 1.20 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 1.20 GHz.

I'm going nuts over this.

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#9 2012-04-03 14:08:04

yasar11732
Member
Registered: 2010-11-29
Posts: 127

Re: [SOLVED] cpufreq only works sometimes?

The only solution I could find was to disable cpufreq until a workaround is found. I checked kernel's bug tracker, and couldn't find a matching bug report. I am not sure how we could report this, since it's not easily reproducable.

Yo Dawg, I heard you likes patches, so I have created a patch for your patch, so you can patch your patches before you patch.

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#10 2012-04-03 14:47:42

GERGE
Member
From: Turkey
Registered: 2008-09-29
Posts: 157
Website

Re: [SOLVED] cpufreq only works sometimes?

I think you should try cpupower, it works much better. More advanced too.

Just install it and edit /etc/conf.d/cpupower

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#11 2012-04-03 15:52:18

yasar11732
Member
Registered: 2010-11-29
Posts: 127

Re: [SOLVED] cpufreq only works sometimes?

I have created a bug report about this in here: https://bugzilla.kernel.org/show_bug.cgi?id=43037

Yo Dawg, I heard you likes patches, so I have created a patch for your patch, so you can patch your patches before you patch.

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#12 2012-04-05 08:11:41

penguin
Member
From: Gotham City
Registered: 2010-12-31
Posts: 168

Re: [SOLVED] cpufreq only works sometimes?

@yasar11732
Thanks for filing a bug report.

I've tried poking around in the BIOS but as far as I can tell, all CPU functions are enabled.

Also, I haven't seen cpufreq work for quite some time now. It's always stuck. I uninstalled it and installed cpupower instead but same thing there.

On Arch I have everything up to date, i.e. kernel 3.2-13-1, and cpufrequtils 008-2-x86_64
On Debian (same computer) I have kernel 2.35-5 cpufrequtils 007-1

I'm posting my hardware info below, in case it can help the bugreport.
output from lscpu (vat /proc/cpu)

processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 37
model name	: Intel(R) Core(TM) i5 CPU       M 540  @ 2.53GHz
stepping	: 5
microcode	: 0x2
cpu MHz		: 1199.000
cache size	: 3072 KB
physical id	: 0
siblings	: 4
core id		: 0
cpu cores	: 2
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 popcnt aes lahf_lm ida arat dts tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5055.21
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 37
model name	: Intel(R) Core(TM) i5 CPU       M 540  @ 2.53GHz
stepping	: 5
microcode	: 0x2
cpu MHz		: 1199.000
cache size	: 3072 KB
physical id	: 0
siblings	: 4
core id		: 0
cpu cores	: 2
apicid		: 1
initial apicid	: 1
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 popcnt aes lahf_lm ida arat dts tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5055.54
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

processor	: 2
vendor_id	: GenuineIntel
cpu family	: 6
model		: 37
model name	: Intel(R) Core(TM) i5 CPU       M 540  @ 2.53GHz
stepping	: 5
microcode	: 0x2
cpu MHz		: 1199.000
cache size	: 3072 KB
physical id	: 0
siblings	: 4
core id		: 2
cpu cores	: 2
apicid		: 4
initial apicid	: 4
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 popcnt aes lahf_lm ida arat dts tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5055.55
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

processor	: 3
vendor_id	: GenuineIntel
cpu family	: 6
model		: 37
model name	: Intel(R) Core(TM) i5 CPU       M 540  @ 2.53GHz
stepping	: 5
microcode	: 0x2
cpu MHz		: 1199.000
cache size	: 3072 KB
physical id	: 0
siblings	: 4
core id		: 2
cpu cores	: 2
apicid		: 5
initial apicid	: 5
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 popcnt aes lahf_lm ida arat dts tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5055.54
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

Output from lspci -vv

00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02)
	Subsystem: Lenovo Device 2193
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx-
	Latency: 0
	Capabilities: <access denied>
	Kernel driver in use: agpgart-intel

00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02) (prog-if 00 [VGA controller])
	Subsystem: Lenovo Device 215a
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 43
	Region 0: Memory at f2000000 (64-bit, non-prefetchable) [size=4M]
	Region 2: Memory at d0000000 (64-bit, prefetchable) [size=256M]
	Region 4: I/O ports at 1800 [size=8]
	Expansion ROM at <unassigned> [disabled]
	Capabilities: <access denied>
	Kernel driver in use: i915

00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
	Subsystem: Lenovo Device 215f
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 42
	Region 0: Memory at f2727800 (64-bit, non-prefetchable) [size=16]
	Capabilities: <access denied>
	Kernel driver in use: mei

00:16.3 Serial controller: Intel Corporation 5 Series/3400 Series Chipset KT Controller (rev 06) (prog-if 02 [16550])
	Subsystem: Lenovo Device 2162
	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Interrupt: pin B routed to IRQ 17
	Region 0: I/O ports at 1808 [size=8]
	Region 1: Memory at f2524000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: <access denied>
	Kernel driver in use: serial

00:19.0 Ethernet controller: Intel Corporation 82577LM Gigabit Network Connection (rev 06)
	Subsystem: Lenovo Device 2153
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 41
	Region 0: Memory at f2500000 (32-bit, non-prefetchable) [size=128K]
	Region 1: Memory at f2525000 (32-bit, non-prefetchable) [size=4K]
	Region 2: I/O ports at 1820 [size=32]
	Capabilities: <access denied>
	Kernel driver in use: e1000e

00:1a.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 06) (prog-if 20 [EHCI])
	Subsystem: Lenovo Device 2163
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin D routed to IRQ 23
	Region 0: Memory at f2728000 (32-bit, non-prefetchable) [size=1K]
	Capabilities: <access denied>
	Kernel driver in use: ehci_hcd

00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 06)
	Subsystem: Lenovo Device 215e
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin B routed to IRQ 45
	Region 0: Memory at f2520000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: <access denied>
	Kernel driver in use: snd_hda_intel

00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 06) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Bus: primary=00, secondary=0d, subordinate=0d, sec-latency=0
	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
	BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: <access denied>
	Kernel driver in use: pcieport

00:1c.3 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 4 (rev 06) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Bus: primary=00, secondary=05, subordinate=0c, sec-latency=0
	I/O behind bridge: 00002000-00002fff
	Memory behind bridge: f0000000-f1ffffff
	Prefetchable memory behind bridge: 00000000f2800000-00000000f28fffff
	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
	BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: <access denied>
	Kernel driver in use: pcieport

00:1c.4 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 5 (rev 06) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
	Memory behind bridge: f2400000-f24fffff
	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
	BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: <access denied>
	Kernel driver in use: pcieport

00:1d.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 06) (prog-if 20 [EHCI])
	Subsystem: Lenovo Device 2163
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin D routed to IRQ 19
	Region 0: Memory at f2728400 (32-bit, non-prefetchable) [size=1K]
	Capabilities: <access denied>
	Kernel driver in use: ehci_hcd

00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a6) (prog-if 01 [Subtractive decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Bus: primary=00, secondary=0e, subordinate=0e, sec-latency=0
	Secondary status: 66MHz- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
	BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: <access denied>

00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 06)
	Subsystem: Lenovo Device 2166
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Capabilities: <access denied>

00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 6 port SATA AHCI Controller (rev 06) (prog-if 01 [AHCI 1.0])
	Subsystem: Lenovo Device 2168
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin B routed to IRQ 40
	Region 0: I/O ports at 1860 [size=8]
	Region 1: I/O ports at 1814 [size=4]
	Region 2: I/O ports at 1818 [size=8]
	Region 3: I/O ports at 1810 [size=4]
	Region 4: I/O ports at 1840 [size=32]
	Region 5: Memory at f2727000 (32-bit, non-prefetchable) [size=2K]
	Capabilities: <access denied>
	Kernel driver in use: ahci

00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 06)
	Subsystem: Lenovo Device 2167
	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Interrupt: pin A routed to IRQ 23
	Region 0: Memory at f2728800 (64-bit, non-prefetchable) [size=256]
	Region 4: I/O ports at 1880 [size=32]
	Kernel driver in use: i801_smbus

00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 06)
	Subsystem: Lenovo Device 2190
	Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Interrupt: pin D routed to IRQ 19
	Region 0: Memory at f2526000 (64-bit, non-prefetchable) [size=4K]
	Capabilities: <access denied>
	Kernel driver in use: intel ips

02:00.0 Network controller: Intel Corporation Centrino Advanced-N 6200 (rev 35)
	Subsystem: Intel Corporation Centrino Advanced-N 6200 2x2 AGN
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 44
	Region 0: Memory at f2400000 (64-bit, non-prefetchable) [size=8K]
	Capabilities: <access denied>
	Kernel driver in use: iwlwifi

ff:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02)
	Subsystem: Lenovo Device 2196
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0

ff:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02)
	Subsystem: Lenovo Device 2196
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0

ff:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02)
	Subsystem: Lenovo Device 2196
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0

ff:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02)
	Subsystem: Lenovo Device 2196
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0

ff:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
	Subsystem: Lenovo Device 2196
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0

ff:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
	Subsystem: Lenovo Device 2196
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0

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#13 2012-04-11 15:14:06

penguin
Member
From: Gotham City
Registered: 2010-12-31
Posts: 168

Re: [SOLVED] cpufreq only works sometimes?

I've investigated this further, and seems like it never works when I remove the battery pack, but it always works when I run on pure battery power.

Today I got a very good answer on irc.freenode.net ##ibmthinkpad channel (one that I hope will turn out to be correct):

<impaktor> My cpufreq doesn't work on thinkpad X201 without the battery pack                              
           installed. Anyone else experienced this?                     [14:56]
<Zhenech> 65W dc? "expected"
<Zhenech> blame lenovo
<|Caterpillar|> zomg                                                    [14:57]
<|Caterpillar|> can you explain?
<Zhenech> bios is like:
<Zhenech> if (! battery && dc_power < 90W) possible_cpu_freqs = LOW;    [14:58]
<Zhenech> else possible_cpu_freqs = HAAAAAAAAAAAAAI;
<impaktor> Well, I've experienced that it get's stuck on only low freq when                               
           using just power cord. But I can't find a pattern when using                                   
           battery+power cord. Sometimes it works, sometimes it doesnt.                                   
                                                                        [14:59]
<impaktor> But it seems like it always works when running on pure power.                                  
                                                                        [15:00]
<impaktor> Zhenech: very interesting. I've never thought about this. Do you                               
           think one should change power-unit?
<Zhenech> it should always work with battery & power
<Zhenech> try a 90W one                                                 [15:01]
<impaktor> hm. Not sure that it is what I'm seeing. seems like it depends on                              
           randomness. 
<impaktor> Zhenech: will I risk burning the computer?
<Zhenech> no                                                            [15:02]
<impaktor> 90W pure lenovo brand or bootleg?
<Zhenech> lenovo 
<|Caterpillar|> Zhenech: how can battery and dc_power supply more than 65W? If                            
                you need to recharge the battery and keep working the                                     
                computer, is not possible to generate more than 65 watt, isn't                            
                it?                                                     [15:04]
<impaktor> For reference: http://www.thinkwiki.org/wiki/Power_Connector
                                                                        [15:05]
<Zhenech> Caterpillar, thats not the point
<Zhenech> Caterpillar, lenovo thinks that if you watch 10 tabs of youporn                                 
          while compiling android on a usb-drive on pure DC power, you might                              
          USE more than 65W
<Zhenech> resulting in: not enough power, puff, machine off             [15:06]
<Zhenech> so they say: either have both, AC(65W) and battery for backup
<Zhenech> or a 90W AC that should hold the power
<Zhenech> funny they deliver the machine with a 65W one
<impaktor> This is very interesting. I think I'll try this.             [15:11]
<impaktor> But is this consistent with cpufreq working on pure battery? So the                            
           battery is good, i.e. can deliver more than the 65W? Or should I be                            
           seeign that cpufreq doesn't work?                            [15:12]
<Zhenech> battery should be able to deliver enough, yeah                [15:13]
<Zhenech> never had problems with this on my X201s

So in summary, I think this is a matter of the power supply failing to deliver what the computer believes it needs for using all the available frequencies.

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#14 2012-04-12 04:46:29

travmon
Member
From: Canada
Registered: 2010-09-17
Posts: 8

Re: [SOLVED] cpufreq only works sometimes?

This is wrong subforum. This is not related to installing arch. Should be moved to Kernel & Hardware subforum.

foggy shades, bright outside

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